Move few APIs out of CrashRecovery

We are moving following methods out of module as having them as SystemApi doesn't add much value.
1. isRecoveryTriggeredReboot: This would return true is reboot is triggered during recovery mitigations.
2. registerConnectivityModuleHealthListener: This is used in parallel to detect Connectivity errors. We will be moving away from this in future.

Bug: 338468233
Test: TH
Flag: EXEMPT refactor
Change-Id: I3fe132398b250d6e750a2da5f0438324f650a275